EP0981057A3 - MRI magnet assembly with non-conductive inner wall - Google Patents

MRI magnet assembly with non-conductive inner wall Download PDF

Info

Publication number
EP0981057A3
EP0981057A3 EP99306140A EP99306140A EP0981057A3 EP 0981057 A3 EP0981057 A3 EP 0981057A3 EP 99306140 A EP99306140 A EP 99306140A EP 99306140 A EP99306140 A EP 99306140A EP 0981057 A3 EP0981057 A3 EP 0981057A3
Authority
EP
European Patent Office
Prior art keywords
wall
magnet assembly
magnet
conductive inner
mri magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99306140A
Other languages
German (de)
French (fr)
Other versions
EP0981057B1 (en
EP0981057A2 (en
Inventor
Robert Arvin Hedeen
Sayed-Amr El-Hamamsy
Kenneth Gordon Herd
William Alan Edelstein
Robert Adolph Ackermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of EP0981057A2 publication Critical patent/EP0981057A2/en
Publication of EP0981057A3 publication Critical patent/EP0981057A3/en
Application granted granted Critical
Publication of EP0981057B1 publication Critical patent/EP0981057B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
    • G01R33/3854—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils means for active and/or passive vibration damping or acoustical noise suppression in gradient magnet coil systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/879—Magnet or electromagnet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/888—Refrigeration
    • Y10S505/892—Magnetic device cooling
    • Y10S505/893—Spectrometer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/888—Refrigeration
    • Y10S505/898—Cryogenic envelope

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

An MR magnet assembly (10) includes a cylindrical vessel for housing a superconducting magnet and having a vacuum between its inner and outer walls (14,13). The vessel defines a magnet bore (36) for receiving a patient to be imaged. A gradient coil assembly (66) is mounted in the bore adjacent the inner wall (14) of the magnet assembly. To reduce gradient coil noise, the inner wall is constructed of a nonconductive material which does not support eddy currents.
EP99306140A 1998-08-14 1999-08-03 MRI magnet assembly with non-conductive inner wall Expired - Lifetime EP0981057B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/134,764 US6157276A (en) 1998-08-14 1998-08-14 MRI magnet assembly with non-conductive inner wall
US134764 1998-08-14

Publications (3)

Publication Number Publication Date
EP0981057A2 EP0981057A2 (en) 2000-02-23
EP0981057A3 true EP0981057A3 (en) 2001-10-17
EP0981057B1 EP0981057B1 (en) 2006-07-26

Family

ID=22464884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99306140A Expired - Lifetime EP0981057B1 (en) 1998-08-14 1999-08-03 MRI magnet assembly with non-conductive inner wall

Country Status (4)

Country Link
US (1) US6157276A (en)
EP (1) EP0981057B1 (en)
JP (1) JP4341109B2 (en)
DE (1) DE69932477D1 (en)

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DE19940551C1 (en) * 1999-08-26 2001-05-23 Siemens Ag Magnetic resonance imaging device with vibration-decoupled outer shell
DE19940550C1 (en) * 1999-08-26 2001-05-23 Siemens Ag Medical magnetic resonance tomography device with vacuum insulated gradient coil system
US6324851B1 (en) * 1999-12-09 2001-12-04 Abb Power T&D Company Inc. Cryostat for use with a superconducting transformer
US6556012B2 (en) 2000-01-21 2003-04-29 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
US6567685B2 (en) * 2000-01-21 2003-05-20 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
US6954068B1 (en) 2000-01-21 2005-10-11 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
JP2002200055A (en) * 2000-12-28 2002-07-16 Toshiba Medical System Co Ltd Magnetic resonance imaging apparatus
US6437568B1 (en) 2000-10-02 2002-08-20 General Electric Company Low noise MRI scanner
US6564900B1 (en) 2000-11-22 2003-05-20 Ge Medical Systems Global Technology Company, Llc Method and apparatus for reducing acoustic noise in MRI scanners
US7013553B2 (en) * 2001-06-20 2006-03-21 General Electric Company Superconducting magnet coil support structure
DE10229491C2 (en) 2001-07-23 2003-05-22 Siemens Ag Nuclear spin tomography device with damping layer plates for vibration reduction
US7400146B2 (en) 2002-05-08 2008-07-15 Koninklijke Philips Electronics N.V. Magnetic resonance imaging apparatus with reduced noise production
US7411331B2 (en) * 2002-05-10 2008-08-12 Massachusetts Institute Of Technology Dielectric elastomer actuated systems and methods
US7362889B2 (en) * 2002-05-10 2008-04-22 Massachusetts Institute Of Technology Elastomeric actuator devices for magnetic resonance imaging
US6883226B2 (en) * 2002-09-12 2005-04-26 Ge Medical Systems Global Technology Company, Llc Near net shape coil support structure
US6783059B2 (en) * 2002-12-23 2004-08-31 General Electric Company Conduction cooled passively-shielded MRI magnet
GB2408804B (en) * 2003-12-05 2006-11-01 Ge Med Sys Global Tech Co Llc Near net shape coil support structure
CN101019036A (en) * 2004-06-17 2007-08-15 皇家飞利浦电子股份有限公司 Magnetic resonance imaging system with iron-assisted magnetic field gradient system
DE102004043988B3 (en) * 2004-09-11 2006-05-11 Bruker Biospin Gmbh Superconductive magnet coil arrangement
US7705701B2 (en) * 2005-07-15 2010-04-27 General Electric Company Thin metal layer vacuum vessels with composite structural support
CN101341418A (en) * 2005-12-20 2009-01-07 皇家飞利浦电子股份有限公司 Magnetic resonance scanner with a longitudinal magnetic field gradient system
DE102006000923B4 (en) * 2006-01-05 2009-10-29 Siemens Ag Magnetic resonance device, comprising a, preferably substantially cylindrical vacuum housing containing a magnet and a cooling device
US7518370B2 (en) * 2006-11-30 2009-04-14 General Electric Company Low eddy current vacuum vessel and method of making same
EP2144258B1 (en) * 2008-07-10 2011-10-26 Bruker HTS GmbH Cryostat for an electrical power conditioner
US20100102908A1 (en) * 2008-10-24 2010-04-29 Wang Nmr Inc Annular multi-cell endless box girder apparatus for a quench avoidant coldmass in an mri magnet
CA2717541C (en) 2010-10-13 2016-02-16 Perm Instruments Inc. Multi-phase metering device for oilfield applications
US10371653B2 (en) 2010-10-13 2019-08-06 Perm Instruments Inc. Multi-phase metering device for oilfield applications
JP5361917B2 (en) * 2011-02-07 2013-12-04 東芝医用システムエンジニアリング株式会社 Magnetic resonance imaging system
JP5361919B2 (en) * 2011-02-07 2013-12-04 東芝医用システムエンジニアリング株式会社 Magnetic resonance imaging system
JP5361918B2 (en) * 2011-02-07 2013-12-04 東芝医用システムエンジニアリング株式会社 Magnetic resonance imaging system
US9322892B2 (en) 2011-12-20 2016-04-26 General Electric Company System for magnetic field distortion compensation and method of making same
US9279871B2 (en) 2011-12-20 2016-03-08 General Electric Company System and apparatus for compensating for magnetic field distortion in an MRI system
CA2871384C (en) 2012-04-30 2020-04-21 Children's Hospital Medical Center Acoustic noise reducing rf coil for magnetic resonance imaging
GB2503460B (en) * 2012-06-26 2014-08-13 Siemens Plc Method and apparatus for reduction of gradient coil vibration in MRI systems
US9274188B2 (en) 2012-11-30 2016-03-01 General Electric Company System and apparatus for compensating for magnetic field distortion in an MRI system
DE102013202163A1 (en) * 2013-02-11 2014-08-14 Siemens Aktiengesellschaft A magnetic resonance apparatus
GB2545436B (en) * 2015-12-15 2018-04-11 Siemens Healthcare Ltd A cylindrical superconducting magnet with a shield of ferromagnetic material

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH01208817A (en) * 1988-02-17 1989-08-22 Fuji Electric Co Ltd Magnet device for nuclear magnetic resonance type diagnostic apparatus
US4881035A (en) * 1987-11-24 1989-11-14 Siemens Aktiengesellschaft Magnetic structural arrangement of an installation for nuclear magnetic resonance tomography with superconducting background field coils and normal-conducting gradient coils
EP0364019A1 (en) * 1988-10-03 1990-04-18 Philips Patentverwaltung GmbH Device for sound damping and HF screening of the patient examination space in an MR tomography apparatus
EP0414528A2 (en) * 1989-08-23 1991-02-27 General Electric Company Ferromagnetic compensation rings for high field strength magnets
US5442928A (en) * 1994-08-05 1995-08-22 General Electric Hybrid cooling system for a superconducting magnet
US5550472A (en) * 1995-04-13 1996-08-27 Picker International, Inc. Combined radio frequency coil with integral magnetic field shim set

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US4492090A (en) * 1983-09-19 1985-01-08 General Electric Company Cryostat for NMR magnet
US4642569A (en) * 1983-12-16 1987-02-10 General Electric Company Shield for decoupling RF and gradient coils in an NMR apparatus
US4771256A (en) * 1987-04-02 1988-09-13 General Electric Company Integral shield for mr magnet
US4896128A (en) * 1988-11-30 1990-01-23 General Electric Company Support structure for high field magnet coils
US4879515A (en) * 1988-12-22 1989-11-07 General Electric Company Double-sided RF shield for RF coil contained within gradient coils of NMR imaging device
US4910462A (en) * 1989-04-28 1990-03-20 General Electric Company Etched Z-axis gradient coils for NMR system
US4986078A (en) * 1989-08-17 1991-01-22 General Electric Company Refrigerated MR magnet support system
US5034713A (en) * 1990-04-06 1991-07-23 General Electric Company Radial support system for a MR magnet
US5278502A (en) * 1991-09-13 1994-01-11 General Electric Company Refrigerated superconducting MR magnet with integrated cryogenic gradient coils
US5489848A (en) * 1992-09-08 1996-02-06 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
US5635839A (en) * 1994-11-04 1997-06-03 Picker International, Inc. High order passive shimming assembly for MRI magnets
US5530413A (en) * 1995-10-20 1996-06-25 General Electric Company Superconducting magnet with re-entrant tube suspension resistant to buckling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881035A (en) * 1987-11-24 1989-11-14 Siemens Aktiengesellschaft Magnetic structural arrangement of an installation for nuclear magnetic resonance tomography with superconducting background field coils and normal-conducting gradient coils
JPH01208817A (en) * 1988-02-17 1989-08-22 Fuji Electric Co Ltd Magnet device for nuclear magnetic resonance type diagnostic apparatus
EP0364019A1 (en) * 1988-10-03 1990-04-18 Philips Patentverwaltung GmbH Device for sound damping and HF screening of the patient examination space in an MR tomography apparatus
EP0414528A2 (en) * 1989-08-23 1991-02-27 General Electric Company Ferromagnetic compensation rings for high field strength magnets
US5442928A (en) * 1994-08-05 1995-08-22 General Electric Hybrid cooling system for a superconducting magnet
US5550472A (en) * 1995-04-13 1996-08-27 Picker International, Inc. Combined radio frequency coil with integral magnetic field shim set

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 513 (E - 847) 16 November 1989 (1989-11-16) *

Also Published As

Publication number Publication date
DE69932477D1 (en) 2006-09-07
EP0981057B1 (en) 2006-07-26
JP4341109B2 (en) 2009-10-07
JP2000060823A (en) 2000-02-29
EP0981057A2 (en) 2000-02-23
US6157276A (en) 2000-12-05

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